#94: replicant un-wreck now rides the DEATH-STATE EXIT edge -- the zone

falling-edge latch was blind to zone-less (collision) deaths

The peer wreck lifecycle listened to two different signals: wreck ON came
from the replicated death explosion (unconditional), wreck OFF from a
damage-zone falling edge (wasWrecked latch, armed only when a zone crossed
>= 1.0 on the observer).  The #83 collision damage prices as internal
rattle and never moves a zone, so a fresh mech killed by ramming could
NEVER un-wreck on peers -- the live respawned mech drove around wearing
the hulk (night-7 field report: SAURON's Loki, screenshotted by both
observers at the exact minute the log analysis places the ram death).

MechDeathHandler::Tick now tracks prevMode and fires the rebuild + warp
when the replicated MovementMode leaves the death modes {2,9} -- only
Mech::Reset ever does that, and the state rides every record header, so
the trigger is cause-agnostic.  The zone falling edge just refreshes the
cache.  Side effect fixed for free: the peer respawn warp vortex now
plays for zone-less deaths too (same gate).

Bench (scratchpad/night7/mp_zoneless.sh + the new
BT_SELF_DAMAGE_TYPE=collision harness option, which dispatches type-0
through the real TakeDamage divert): 14/14 zone-less deaths un-wrecked
(mode 9->1) with zero zone rises on the observer; explosive regression
leg 12/12 with zone destruction active.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019Zh7PTkFy4KwTzVighLR9J

context/multiplayer.md

@@ -282,6 +282,18 @@ engine/port member.  Wire sizes verified live (0x14/0x20/0x2c/0x78).  Key mechan
   NO replicant VehicleDead) — the death SINK/burial gap (old item 3) is CLOSED.  Respawn:
   `Force(0x1f)` burst snaps the replicant to the drop zone + un-wrecks it.  Walking replicant
   un-regressed (run states 10→12, legCycle tracking, with type-3 records flowing).  Solo clean.
+- **The replicant UN-WRECK trigger is the DEATH-STATE EXIT edge, not a zone edge (#94 fix,
+  2026-07-31) [T2]**: `MechDeathHandler::Tick` (mechdmg.cpp) tracks `prevMode` and fires
+  `BTRebuildMechModel` + `BTStartWarpEffect` when the replicated `MovementMode()` LEAVES the death
+  modes {2,9} (only `Mech::Reset`'s `SetMovementMode(0)` + `ForceUpdate(0x1f)` ever does; the state
+  rides every record header).  The previous trigger — a damage-zone falling-edge latch
+  (`wasWrecked`, `prev>=1.0 -> <1.0`) — was BLIND to ZONE-LESS deaths: the #83 collision damage
+  prices as internal rattle and never moves a zone, so a fresh mech killed by ramming left the
+  latch unarmed and the peer's wreck could never un-wreck — the live respawned mech drove around
+  wearing the hulk (night-7 field report: SAURON's Loki after the full-speed ram; both peers
+  screenshotted it).  Bench (`scratchpad/night7/mp_zoneless.sh`, `BT_SELF_DAMAGE_TYPE=collision`
+  dispatches type-0 through the real TakeDamage divert): 14/14 zone-less deaths un-wrecked
+  (`mode 9->1`), zero zone-damage rises on the observer; explosive regression leg clean.
 - Telemetry: `[mrec-tx]/[mrec-rx]` per non-pose record (BT_REPL_LOG).  Note the type-1 rx line
   prints a bogus simState (the damage record's own layout at +0xC) — cosmetic.
 - New by-name members: `poseSyncLatch@0x77c` (dead-reckon re-base latch, consumed by
@@ -802,7 +814,9 @@ transition, HUD all landed since P6): console egg → mesh → RunningMission on
      absolute_time` → unbounded → UV precision loss → radial "spokes"), fixed with `fmodf`; that also
      cleans the scrolling beam grit. See [[reconstruction-gotchas]] §13. PEER WARP IS WIRED + VISIBLE
      (`160b78e`): an observer sees a peer's un-wreck warp via the world-anchored `BTStartWarpEffect`
-     (mechdmg.cpp:1074, `ReplicantInstance`-gated; `simulationState` rides every record header).
+     (`MechDeathHandler::Tick`, `ReplicantInstance`-gated; since the #94 fix it fires on the
+     death-state EXIT edge of the replicated `MovementMode` — cause-agnostic, so zone-less
+     collision deaths warp too; `simulationState` rides every record header).
      REMAINING [T3, non-gating]: the peer sphere is anchored to the peer's WORLD position, not the
      peer's authentic `DropZoneLocation` (that attribute isn't replicated) — a fidelity refinement.
      Also confirm the COLLAPSE (death-side) warp fires on every MP death path (force-damage test logged